0 dB SMA Cryogenic Fixed Attenuator DC–18 GHz 2 W VST-QU-SMA000202-18G

P/N: VST-QU-SMA000202-18G

  • For cryogenic signal routing and impedance matching
  • Near-through response with minimal added loss
  • Inline SMA format for easy system integration
  • Well suited to quantum and dilution refrigerator setups
  • Supports precision microwave paths through 18 GHz
Engineering Note
The VST-QU-SMA000202-18G is a 0 dB SMA cryogenic fixed attenuator for low-temperature RF systems that require minimal signal reduction while maintaining a controlled 50 Ω path. It supports DC–18 GHz operation with a 2 W power rating, ±0.3 dB attenuation tolerance, and VSWR 1.35:1 max. This inline attenuator is suited to cryogenic RF systems, quantum computing applications, dilution refrigerator signal chains, and other microwave measurement setups where stable interconnect behavior is required.

Technical Specifications

Part Number VST-QU-SMA000202-18G
Product Type SMA Cryogenic Fixed Attenuator
Nominal Attenuation 0 dB
Attenuation Tolerance ±0.3 dB
Frequency Range DC–18 GHz
VSWR (Max) 1.35 : 1
Impedance 50 Ω
Power Rating 2 W
Connector Interface SMA-JK
Body Material Brass, gold-plated
Male Inner Contact Beryllium copper, gold-plated
Female Inner Contact Beryllium copper, gold-plated
Body Length 22 ± 1 mm
Across Flats 5/16 HEX
Structure Inline SMA cryogenic fixed attenuator
Body Format 0–12 dB body format
Compliance RoHS
Configuration Non-magnetic option available

Target Applications

Cryogenic RF Systems
Suitable for low-temperature RF paths where impedance continuity is needed with minimal nominal attenuation.

Quantum Computing Signal Chains
Used in dilution refrigerator and quantum measurement setups where controlled RF path matching is required.

Low-Temperature Microwave Measurement
A practical choice for cryogenic test paths, microwave interconnect tuning, and RF path matching in low-temperature environments.

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